US551462A - Veterinary iviouth - Google Patents

Description

{No Model) 2 SheetsSheet 1.

H. P. GONDON.

VETERINARY MOUTH SPEOULUM.

No. 551,462. Patented Dec. 17, 1895.

( l.) Q 2 Sheets$heet- 2.

H. P. CONDON. VETERINARY MOUTH SPEGULUM.

N0. 551,462. Patented Dec. 17, 1895.

UNTTED STATES PATENT @EETQE.

HENRY F. CONDON, OF DE KALB, ILLINOIS, ASSIGNOR F ONE-HALF TO JOSEPH F. GLIDDEN', OF SAME PLACE.

VETERINARY MOU TH-SPECULUM.

SPECIFICATION forming part of Letters Patent No. 551,462, dated December 17, 1895.

vthe animal may be sufficiently distended to permit the desired operations, while leaving the mouth unobstructed on the sides as well as in front.

The instrument is so made that when not in use it can be compactly folded and may be carried in an overcoat-pocket.

To this end my invention consists in an instrument of the class described, comprising two pairs of jaws, each pair connected at the forward ends by spreader-bars, the connec tion being preferably pivotal, so as to permit the jaws to be folded or collapsed, in combination with diagonally-arranged levers which pivotally connect the upper and lower jaws on each side together, and a locking device applied to the jaws, preferably at their rear ends.

In the accompanying drawings, Figure 1 is a perspective view showing the speculum applied. Fig. 2 is atop or plan view. Fig. 3 is an elevation showing the speculum open. Fig. & shows it closed or in position for application, and Fig. 5 shows it folded or collapsed.

In the drawings, A A represent the upper jaws, which are pivotally connected at their forward ends to a spreader-bar B.

C C represent lower jaws, which are likewise pivot-ally connected at their forward ends to a lower spreader-bar D.

E represents levers, arranged diagonally to each other and pivotally connected at their rear ends to the jaws A G near the rear ends of the latter, while the forward ends of said levers are connected, respectively, to the jaws A G by the pivots a c. The forward ends of said lovers are preferably extended beyond Serial No. 526,455. (No model.)

their pivotal connections a c, the extended ends being perforated, as seen at e, to receive the straps or branches of a head-stall F. The jaws A G are similarly connected by le vers E.

G represents a locking-bar having one or more locking-notches g adapted to engage a pin or other stop 71, which may be the rear pivot of one of the levers E, the upper end of the locking-bar bein g carried by the rear pivot of the other of said levers. A spring I is arranged to bear upon the lockin g lever or pawl.

\Vhen the instrument is opened to the po sition shown in Fig. 3, the spreader-bars and the forward ends of the upper and lower jaws separate while the rear ends of the jaws approach each other and the locking-bar engages the loek-pin, thus locking them in the open position. The lockingmechanisms may be duplicated, one for each side, and the locking-levers may be provided with a chain J by which they may be detached simultaneously.

The instrument is applied in the same manner as a bridle with the locking-bars close toget-her until they have entered the animals mouth and passed behind the incisors. As the animal opens its mouth, or as the mouth is forced open, and the spreader-bars separated the locking-har will en gage and thus the mouth will be held in the distended position, leaving the front and sides of the mouth open. It will be observed that in this construction the rear ends of the jaws do notwhen in the position of use come together, and therefore the mouth may be opened as wide as necessary without unduly separating the spreaderbars and with a comparatively small or slight movement of the rear ends of the jaws. \lit-h this instrument, therefore, the jaws may be made straight, and I prefer to so make them on account of economy of manufacture. All of the parts of the instrument, when of the form shown, may be punched out from steel bars of suitable thickness and width and an exceedingly strong, durable and cheap in strument can'thus be provided.

It is the object of my invention, primarily, to furnish an instrument at such low cost that it will be taken out of the class of surgical appliances and placed within the reach of stock -owners generally. It has of late of movements an d adjustments, and that the operation of this instrument is exceedingly simple, while it is constructed so that it will 1 not unduly excite the animal when putting it in position, and when not in 'use it may be com:-

' paetly folded by first closing it to the position modified in construction and changed as to lo-v cation and I do not therefore limit my inven I shown in Fig. 4:, and afterward folding the jaws upon each other as seen in Fig.v 5.

Obviously the locking mechanism may be tion totlle precise structural details shown.

I claim p 1. A veterinary mouth speculum, comprising in combination upper and lower jaws, spreader bars pivotally connecting said jaws in pairs at their forward ends, levers pivoted to said jaws at their rear ends and said levers crossing; each other and being pivotally connectedto the upper and lower jaws, between their ends, substantially as described.

i2. A veterinary mouth speculum, comprising in combination upper and lower jaws, spreader bars pivot/ally connecting said jaws at their forward ends, leversvpivotally connecting the upper and lower jaws together, said levers beingarranged to cross each other andzhaving their forward ends extended for connection to a head stall substantially as described v A veterinary mouth speculum, comprising in eonlbin ation upper andlower jaws has in g substantially straight bodies, spreader bars pivotally connecting sa idjaws in pairs diagonally a ranged levers two for each side 1 crossing each other and connecting anuppcr w an d a lower jaw pivotallytogether and a looking device applied tothe rear ends of said jaws, substantially as described.

HENRY F GONDON.

Witnesses 1 v Geo. D. ()"BRI N, v CHAS. ROBINSON.

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